CN107091815A - A kind of method for identifying rosewood - Google Patents
A kind of method for identifying rosewood Download PDFInfo
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- CN107091815A CN107091815A CN201710313274.XA CN201710313274A CN107091815A CN 107091815 A CN107091815 A CN 107091815A CN 201710313274 A CN201710313274 A CN 201710313274A CN 107091815 A CN107091815 A CN 107091815A
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- 238000000034 method Methods 0.000 title claims abstract description 49
- 235000009984 Pterocarpus indicus Nutrition 0.000 title claims abstract description 10
- 241000533793 Tipuana tipu Species 0.000 title 1
- 240000005020 Acaciella glauca Species 0.000 claims abstract description 24
- 235000003499 redwood Nutrition 0.000 claims abstract description 24
- 238000010521 absorption reaction Methods 0.000 claims abstract description 22
- 238000002329 infrared spectrum Methods 0.000 claims abstract description 22
- 230000003595 spectral effect Effects 0.000 claims abstract description 14
- 239000000463 material Substances 0.000 claims abstract description 11
- 244000086363 Pterocarpus indicus Species 0.000 claims abstract description 9
- 239000000843 powder Substances 0.000 claims description 22
- 238000000227 grinding Methods 0.000 claims description 19
- 238000012360 testing method Methods 0.000 claims description 18
- 239000002023 wood Substances 0.000 claims description 18
- 238000001228 spectrum Methods 0.000 claims description 14
- UHOVQNZJYSORNB-UHFFFAOYSA-N Benzene Chemical compound C1=CC=CC=C1 UHOVQNZJYSORNB-UHFFFAOYSA-N 0.000 claims description 9
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 9
- XEKOWRVHYACXOJ-UHFFFAOYSA-N Ethyl acetate Chemical compound CCOC(C)=O XEKOWRVHYACXOJ-UHFFFAOYSA-N 0.000 claims description 9
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 claims description 9
- 230000008569 process Effects 0.000 claims description 9
- 238000005070 sampling Methods 0.000 claims description 9
- 239000000284 extract Substances 0.000 claims description 7
- HEDRZPFGACZZDS-UHFFFAOYSA-N Chloroform Chemical compound ClC(Cl)Cl HEDRZPFGACZZDS-UHFFFAOYSA-N 0.000 claims description 6
- RTZKZFJDLAIYFH-UHFFFAOYSA-N Diethyl ether Chemical compound CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 claims description 6
- LRHPLDYGYMQRHN-UHFFFAOYSA-N N-Butanol Chemical compound CCCCO LRHPLDYGYMQRHN-UHFFFAOYSA-N 0.000 claims description 6
- 239000002245 particle Substances 0.000 claims description 6
- 239000002904 solvent Substances 0.000 claims description 6
- 238000001514 detection method Methods 0.000 claims description 4
- 238000012937 correction Methods 0.000 claims description 3
- 230000001186 cumulative effect Effects 0.000 claims description 3
- 239000003208 petroleum Substances 0.000 claims description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 3
- 150000002576 ketones Chemical class 0.000 claims 1
- 238000005516 engineering process Methods 0.000 abstract description 17
- 241000894007 species Species 0.000 abstract description 4
- 230000007812 deficiency Effects 0.000 abstract description 2
- IOLCXVTUBQKXJR-UHFFFAOYSA-M potassium bromide Chemical compound [K+].[Br-] IOLCXVTUBQKXJR-UHFFFAOYSA-M 0.000 description 32
- 240000001606 Adenanthera pavonina Species 0.000 description 15
- 235000011470 Adenanthera pavonina Nutrition 0.000 description 15
- 241000657528 Dalbergia odorifera Species 0.000 description 12
- 230000006872 improvement Effects 0.000 description 11
- 241000522195 Dalbergia Species 0.000 description 9
- 239000008280 blood Substances 0.000 description 9
- 210000004369 blood Anatomy 0.000 description 9
- 239000000126 substance Substances 0.000 description 7
- 238000002156 mixing Methods 0.000 description 6
- 241001544576 Pterocarpus macrocarpus Species 0.000 description 5
- 239000000203 mixture Substances 0.000 description 5
- CSCPPACGZOOCGX-UHFFFAOYSA-N Acetone Chemical compound CC(C)=O CSCPPACGZOOCGX-UHFFFAOYSA-N 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 238000002360 preparation method Methods 0.000 description 4
- 238000004458 analytical method Methods 0.000 description 3
- 230000008901 benefit Effects 0.000 description 3
- 230000006835 compression Effects 0.000 description 3
- 238000007906 compression Methods 0.000 description 3
- 238000012545 processing Methods 0.000 description 3
- 244000186561 Swietenia macrophylla Species 0.000 description 2
- 210000002659 acromion Anatomy 0.000 description 2
- 238000000576 coating method Methods 0.000 description 2
- 235000013399 edible fruits Nutrition 0.000 description 2
- 239000003550 marker Substances 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 229910001220 stainless steel Inorganic materials 0.000 description 2
- 239000010935 stainless steel Substances 0.000 description 2
- 210000002105 tongue Anatomy 0.000 description 2
- 239000002966 varnish Substances 0.000 description 2
- 238000012795 verification Methods 0.000 description 2
- WKBOTKDWSSQWDR-UHFFFAOYSA-N Bromine atom Chemical compound [Br] WKBOTKDWSSQWDR-UHFFFAOYSA-N 0.000 description 1
- 241000345998 Calamus manan Species 0.000 description 1
- 241001527082 Dalbergia cochinchinensis Species 0.000 description 1
- 241000196324 Embryophyta Species 0.000 description 1
- 244000060234 Gmelina philippensis Species 0.000 description 1
- 238000004497 NIR spectroscopy Methods 0.000 description 1
- 241000736192 Ostrya virginiana Species 0.000 description 1
- 244000046052 Phaseolus vulgaris Species 0.000 description 1
- 235000010627 Phaseolus vulgaris Nutrition 0.000 description 1
- ZLMJMSJWJFRBEC-UHFFFAOYSA-N Potassium Chemical compound [K] ZLMJMSJWJFRBEC-UHFFFAOYSA-N 0.000 description 1
- 241000750718 Pterocarpus santalinus Species 0.000 description 1
- 235000014443 Pyrus communis Nutrition 0.000 description 1
- 241000872198 Serjania polyphylla Species 0.000 description 1
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 1
- 238000000862 absorption spectrum Methods 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 125000004429 atom Chemical group 0.000 description 1
- GDTBXPJZTBHREO-UHFFFAOYSA-N bromine Substances BrBr GDTBXPJZTBHREO-UHFFFAOYSA-N 0.000 description 1
- 229910052794 bromium Inorganic materials 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 239000003153 chemical reaction reagent Substances 0.000 description 1
- 238000004587 chromatography analysis Methods 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000006731 degradation reaction Methods 0.000 description 1
- 238000004043 dyeing Methods 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 229930003935 flavonoid Natural products 0.000 description 1
- 150000002215 flavonoids Chemical class 0.000 description 1
- 235000017173 flavonoids Nutrition 0.000 description 1
- 238000004817 gas chromatography Methods 0.000 description 1
- 230000002068 genetic effect Effects 0.000 description 1
- 125000004435 hydrogen atom Chemical group [H]* 0.000 description 1
- 238000003384 imaging method Methods 0.000 description 1
- 238000001727 in vivo Methods 0.000 description 1
- 231100000053 low toxicity Toxicity 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 239000004570 mortar (masonry) Substances 0.000 description 1
- 239000002304 perfume Substances 0.000 description 1
- 229910052700 potassium Inorganic materials 0.000 description 1
- 239000011591 potassium Substances 0.000 description 1
- 238000003908 quality control method Methods 0.000 description 1
- 235000012950 rattan cane Nutrition 0.000 description 1
- 238000009738 saturating Methods 0.000 description 1
- 238000007790 scraping Methods 0.000 description 1
- 229930000044 secondary metabolite Natural products 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 210000001519 tissue Anatomy 0.000 description 1
- 238000000411 transmission spectrum Methods 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/17—Systems in which incident light is modified in accordance with the properties of the material investigated
- G01N21/25—Colour; Spectral properties, i.e. comparison of effect of material on the light at two or more different wavelengths or wavelength bands
- G01N21/31—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry
- G01N21/35—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry using infrared light
- G01N21/3563—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry using infrared light for analysing solids; Preparation of samples therefor
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/28—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q
- G01N1/286—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q involving mechanical work, e.g. chopping, disintegrating, compacting, homogenising
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- Physics & Mathematics (AREA)
- Spectroscopy & Molecular Physics (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Investigating Or Analysing Materials By Optical Means (AREA)
Abstract
The present invention provides a kind of method for identifying rosewood, and this method includes：Prepare sample strip and background plate；Set after spectral scan parameter, scanning background piece and sample strip are distinguished using infrared spectrum, the infrared spectrogram of sample is obtained；According to the characteristic absorption peak information of the infrared spectrogram, whether the material of judgement sample and standard items is consistent.The present invention is directed to many deficiencies of existing redwood identification technology; a kind of lossless, quick, easy to operate, objective and accurate redwood new Identification technology is provided; available for the fakement phenomena for solving the wooden trading of the big tribute in redwood market especially three; so that to safeguard consumer's interests; specification lumber market; non-causative fault is hit, and is contributed for protection rare and endangered tree species.
Description
Technical field
The present invention relates to wood identification technical field, more particularly, to a kind of method for identifying rosewood.
Background technology
Dalbergia odorifera (Dalbergia odorifera), red sandalwood (Pterocarpus santalinus), toe are yellow
Wingceltis (Dalbergia cochinchinensis) (among the people to be commonly called as Hainan Huanghua Pear, India leaflet red sandalwood, the big red acid branch of Laos) exists
It is deep in redwood circle to be liked, it is referred to as " three big tribute wood ".Because of the excellent wooden attribute of these three timber itself and scarcity, by it
The woodenware of making is deep always to be treasured by imperial power noble, with higher historical role, cultural connotation and market value, makees it
Classic furniture is occupied always for rare redwood and text plays the dominant position in market until today.Now, some illegal businessman in order to
Seek exorbitant profit and deliberately obscure material, mix the spurious with the genuine, adulterate, only dalbergia odorifera just there are more than ten personation seeds, greatly disturbs
Disorderly market order, brings huge economic loss to consumer.
The method of traditional wood identification is mainly the form and arrangement mode with tissue according to timber various types of cells, passes through
Microscope is identified.The Microscopic Identification method has many defects：Sample, which is damaged, (need to cut 1cm during sampling3The wood of left and right
Sample), time-consuming for detection, and cost is high, comprising processes such as sofening treatment, section and dyeing, generally requires the time of 2 weeks, Er Qiexu
Want veteran professional to be identified and identify, be difficult to identify kind with certain subjectivity, and at present.
In recent years, the wood recognition technology grown up has DNA marker method, near-infrared spectrum technique, gas chromatographic technique
And high light spectrum image-forming technology.There is also some shortcomings for modern redwood new Identification technology, it is difficult to meets the demand in market.For
DNA marker method, heartwood DNA content is relatively low and palliating degradation degree is serious, and it is relatively difficult that genetic extracts effective DNA from redwood.
Near infrared spectroscopy, spectral regions are at 0.75-2.5 μm, the mainly frequency multiplication of molecule and sum of fundamental frequencies absorption of vibrations area, except containing H atom
Outside chemical bond, other group Bu Ci areas produce absorption, and the chemical information that can be obtained is less, and the mathematics for relying primarily on complexity is built
Mould method is analyzed and recognized.Gas chromatography, the technology also need to wood powder be stripped processing, it is necessary to sample size compared with
Greatly.High light spectrum image-forming technology, is that traditional two-dimensional imaging technique and spectral technique are organically combined, high spectrum image both includes light
Spectrum information, includes image information again, and the analysis of data and extraction comparison are complicated, and the requirement to testing staff is higher.
The content of the invention
The present invention provides a kind of identification rosewood for overcoming above mentioned problem or solving the above problems at least in part
Method, this method can solve existing precious redwood identification technology accuracy is not enough and unhandy problem.
Technique according to the invention scheme includes there is provided a kind of method for identifying rosewood, this method：
S1：Prepare sample strip and background plate；
S2：Scanning background piece and sample strip are distinguished using infrared spectrum, the infrared spectrogram of sample is obtained；
S3：According to the characteristic absorption peak information of the infrared spectrogram, whether the material of judgement sample and standard items is consistent.
As the further improvement project of above-mentioned technical proposal, in the step S1, preparing sample strip includes：
S11：Take redwood sample；
S12：After redwood sample is mixed with KBr, uniform grinding；
S13：Powder after grinding is put to tablet press machine and carries out tabletting.
As the further improvement project of above-mentioned technical proposal, in the step S11, sampling sample is from redwood sample to be measured
Product concealment part scrapes micro wood powder.The varnish of mahogany furniture parts surface to be detected or other coatings are removed (typically can be
Backboard, drawer-bottom board or tables and chairs leg etc. are sampled compared with concealment part, if hand string sample, are sampled in Kong Xinchu), existed with point of a knife
Surface gently scrapes 5mg or so powder.
As the further improvement project of above-mentioned technical proposal, in the step S11, sampling sample can also be taken out for wood powder
Extract, the solvent needed for extracting includes benzene alcohol, methanol, ethanol, acetone, water, petroleum ether, chloroform, ethyl acetate or n-butanol etc.
At least one of solvent.
As the further improvement project of above-mentioned technical proposal, in the step S12, sample and KBr powder after grinding
The particle diameter at end is less than 2.5 μm.With reduce due to sample particle scatter caused by baseline drift, but also should not overmastication,
In order to avoid excessively adsorbing the steam in air, the spectrum of sample is interfered.
As the further improvement project of above-mentioned technical proposal, in the step S12 and S13, sample and KBr it is mixed
The operating process of conjunction, grinding and tabletting is carried out in the range of exposures of infrared lamp.
Carefully the powder of mixing is transferred in compression mold with stainless steel scuppit, mould is assembled into entirety is put into tabletting
In machine, apply unloading pressure after certain pressure, about 8t or so, 1min, you can obtain the sample sheet of transparent or semitransparent shape；
Mold base is removed, the subsidiary receiving container of compression mold (generally uncovered plastic containers) is changed, is put into tablet press machine, ejects
Two pressure tongues in lasso, take out thin slice therein and are placed under infrared lamp, wait to be tested.Whole grinding, mixing and tableting processes
All should quickly it be carried out in the range of exposures of infrared lamp.
As the further improvement project of above-mentioned technical proposal, in the step S1, preparing background plate includes：Take 150mg
KBr sample, potassium bromide background piece is suppressed according to the method for above-mentioned preparation sample strip.Ensure the pure potassium bromide powder of grinding as far as possible
Dynamics with ground sample and during KBr mixture is the same, thus avoid because grinding dynamics is inconsistent cause sample with
The granularity difference of background, produces the inclination of baseline.
As the further improvement project of above-mentioned technical proposal, the step S2 includes, and is joined using identical spectral scan
Number, scanning background piece and sample strip, obtain the spectrogram of sample strip successively.
As the further improvement project of above-mentioned technical proposal, in the step S2, the scanning range of infrared spectrum is set
For 4000-400cm-1, spectral resolution is 4cm-1, cumulative scan 16 times.
Before scanning testing sample, first potassium bromide background is tested according to scanning testing sample identical parameter setting mode
Piece, obtains spectral background.In the next spectrum of scanning testing sample, instrument can carry out background deduction automatically, obtain to be measured
The real spectrum of sample.Using identical spectral scan parameter, successively scanning background piece and sample strip, can be eliminated because of environment or bromine
Change the influence that the impure infrared spectrogram to sample of potassium is brought.
As the further improvement project of above-mentioned technical proposal, in the step S2, sample strip is placed on infrared spectrometer
Tested on specimen holder in sample room, the infrared spectrogram of test sample product to obtain；Infrared spectrogram obtained by observation,
By adjusting the consumption of sample, make the transmitance of most strong absworption peak in sample spectra 10% or so, and most strong absworption peak and base
The difference of the transmitance of line is more than 60%.
As the further improvement project of above-mentioned technical proposal, obtained by infrared spectrometer after infrared spectrogram, then it is right
Resulting infrared spectrogram carries out smooth and baseline correction processing.
As the further improvement project of above-mentioned technical proposal, in the step S3, the ripple of the infrared spectrogram is observed
Section shape, judges whether the characteristic absorption peak consistent with standard items target seeds, according to the peak shape of characteristic absorption peak, peak position
And intensity, judge whether the material of detection sample and standard items is consistent.Peak position, shape are gone out to existing several characteristic peaks
Shape and size identified in detail, can if the peak shape at these specific absorption peaks, peak position and intensity are consistent with standard items
Have this and judge that detected sample is consistent with standard items material.
Based on above-mentioned technical proposal, the method for identification rosewood proposed by the present invention, using infrared in infrared spectrum
Area is identified, with advantages below：Sample size needed for identification is only 5mg or so, and testing sample is not damaged, and is one
Plant Nondestructive Identification technology；Infrared spectrometer analyze speed is fast, and the process of whole sampling, sample preparation, test, analysis and identification is most multi-purpose
When 15min；Simple operation, expense reduction；As a result it is accurate, objective, it is adapted to marketing.
There is provided one kind is lossless, quick, easy to operate, objective for many deficiencies of the invention for existing redwood identification technology
Accurate redwood new Identification technology, available for the fakement phenomena for solving the wooden trading of the big tribute in redwood market especially three, so that
To safeguard consumer's interests, non-causative fault is hit, and contribute for protection rare and endangered tree species in specification lumber market.
Brief description of the drawings
Fig. 1 is the schematic diagram of the authentication method according to the embodiment of the present invention；
Fig. 2 is the infrared spectrogram of the dalbergia odorifera according to the embodiment of the present invention；
Fig. 3 is the infrared spectrogram of the red sandalwood according to the embodiment of the present invention；
Fig. 4 is the infrared spectrogram of the toe yellow wingceltis according to the embodiment of the present invention；
Fig. 5 is the infrared spectrogram of the blood wingceltis according to the embodiment of the present invention；
Fig. 6 is the infrared spectrogram of the Dalbergia louvelii according to the embodiment of the present invention；
Fig. 7 is the infrared spectrogram of the nick yellow wingceltis according to the embodiment of the present invention；
Fig. 8 is the infrared spectrogram of the broad-leaved yellow wingceltis according to the embodiment of the present invention；
Fig. 9 is the infrared spectrogram of the Burma padauk according to the embodiment of the present invention；
Figure 10 is to be contrasted to illustrate according to the infrared spectrum of the dalbergia odorifera of the embodiment of the present invention, Burma padauk and broad-leaved yellow wingceltis
Figure；
Figure 11 is to be contrasted to illustrate according to the infrared spectrum of the red sandalwood of the embodiment of the present invention, Dalbergia louvelii and blood wingceltis
Figure；
Figure 12 is the infrared spectrum contrast schematic diagram of the toe yellow wingceltis according to the embodiment of the present invention and nick yellow wingceltis.
Embodiment
To make the purpose, technical scheme and advantage of the embodiment of the present invention clearer, below in conjunction with the embodiment of the present invention
In accompanying drawing, the technical scheme in the embodiment of the present invention is clearly and completely described, it is clear that described embodiment is
A part of embodiment of the present invention, rather than whole embodiments.Based on the embodiment in the present invention and its between be combined, this
The every other embodiment that field those of ordinary skill is obtained under the premise of creative work is not made, belongs to the present invention
The scope of protection.
Infrared finger print atlas, has specificity and characteristic similar to the fingerprint of the mankind.The collection of illustrative plates is deposited into computer, just
Quick, correct kind can be carried out to it with use quality control search program and the true and false differentiates.Obtained with the technical finesse
Sample, except be adapted to test infrared spectrum in addition to can also test NMR fingerprint.The technology has easy, fast
Speed, it is accurate, economical, using low toxicity reagent, big reproducible, data message amount and spectrum high-specificity the characteristics of, application is wide.
2.5-25 μm of middle infrared of infrared spectrum, is the fundamental vibration uptake zone of molecule, most organic matters and
The basic frequency absorption band of inorganic matter appears at the area, therefore middle infrared spectrum includes more structure of matter information.Different trees
The chemical composition contained is planted there is also certain difference, the redwood of hundreds and thousands of years is especially grown, it have accumulated greatly in vivo
The secondary metabolite of amount, the content of extract is also more high than general timber.Some precious redwood contain specific chemistry
Seeds can be identified by composition according to these peculiar materials.Because the species of atom and the property of chemical bond are different, and
Environment residing for each chemical bond is different, and causing the absorption spectrum of different compounds has respective feature, therefore can be according to red
The infrared finger print atlas of wood is identified it.
According to one embodiment of present invention, with reference to Fig. 1, there is provided a kind of method for identifying rosewood, this method
Including：
S1：Prepare sample strip and background plate；
S2：Scanning background piece and sample strip are distinguished using infrared spectrum, the infrared spectrogram of sample is obtained；
S3：According to the characteristic absorption peak information of the infrared spectrogram, whether the material of judgement sample and standard items is consistent.
According to one embodiment of present invention, in the step S1, preparing sample strip includes：
S11：Take 5mg redwood samples；
S12：After 1-1.5mg samples are mixed with 150mg KBrs, uniform grinding；
S13：Powder after grinding is put to tablet press machine and carries out tabletting.
According to one embodiment of present invention, in the step S11, sampling sample is hidden from redwood sample to be measured
Position scrapes micro wood powder.The varnish of mahogany furniture parts surface to be detected or other coatings are removed (typically can in backboard, take out
Drawer bottom plate or tables and chairs leg etc. are sampled compared with concealment part, if hand string sample, are sampled in Kong Xinchu), it is light on surface with point of a knife
Light scraping 5mg or so powder, and existing authentication method sample size is larger, need to take about 1g samples, is present invention method institute
Need 200 times of sample size.
According to one embodiment of present invention, in the step S11, sampling sample can also be wood powder extract,
Solvent needed for extracting is included in benzene alcohol, methanol, ethanol, acetone, water, petroleum ether, chloroform, ethyl acetate or n-butanol equal solvent
At least one.
According to one embodiment of present invention, in the step S12, the sample of mixing and potassium bromide powder are ground
It is less than 2.5 μm to particle diameter.By 1-1.5mg wood powders, the mixed grinding in agate mortar is uniform together with 150mg KBrs, makes sample
Particle diameter is ground to less than 2.5 μm with potassium bromide powder, to reduce the baseline drift caused by sample particle is scattered, but
Should not overmastication, in order to avoid excessively absorption air in steam, the spectrum of sample is interfered.
According to one embodiment of present invention, in the step S1, mixing, grinding and the tabletting of sample and KBr
Operating process carried out in the range of exposures of infrared lamp.The powder of mixing is carefully transferred to tabletting mould with stainless steel scuppit
In tool, mould is assembled into entirety and is put into tablet press machine, applies unloading pressure after certain pressure, about 8t or so, 1min, you can
Obtain the sample sheet of transparent or semitransparent shape；Mold base is removed, the subsidiary receiving container of compression mold is changed and (is generally nothing
Lid plastic containers), it is put into tablet press machine, two pressure tongues in ejection lasso take out thin slice therein and are placed under infrared lamp, wait
Test.Whole grinding, mixing and tableting processes all should quickly be carried out in the range of exposures of infrared lamp.
According to one embodiment of present invention, in the step S1, preparing background plate includes：Take 150mg KBrs
Sample, potassium bromide background piece is suppressed according to the method for above-mentioned preparation sample strip.Ensure the pure potassium bromide powder of grinding and grinding as far as possible
Dynamics when sample and KBr mixture is the same, so as to avoid causing sample and background because grinding dynamics is inconsistent
Granularity difference, produces the inclination of baseline.
According to one embodiment of present invention, the step S2 includes, using identical spectral scan parameter, successively
Scanning background piece and sample strip, obtain the spectrogram of sample strip.
According to one embodiment of present invention, in the step S2, mid-infrared spectral scanning range is set to
4000-400cm-1, spectral resolution is 4cm-1, cumulative scan 16 times.Before scanning testing sample, first according to be measured with scanning
Sample identical parameter setting mode tests potassium bromide background piece, obtains spectral background.In the light of next scanning testing sample
Time spectrum, instrument can carry out background deduction automatically, obtain the real spectrum of testing sample.It is first using identical spectral scan parameter
Scanning background piece and sample strip, can be eliminated because of the influence that environment or the impure infrared spectrogram to sample of KBr are brought afterwards.
According to one embodiment of present invention, in the step S2, sample strip is placed on infrared spectrograph sample room
Tested on interior specimen holder, the infrared spectrogram of test sample product to obtain；Infrared spectrogram obtained by observation, by adjusting
The consumption of whole sample, makes the transmitance of most strong absworption peak in sample spectra 10% or so, and most strong absworption peak and baseline is saturating
The difference for crossing rate is more than 60%.
According to one embodiment of present invention, when obtaining the infrared spectrum of sample, transmission spectrum method can be used,
Sample strip is prepared using the above method, then scans sample strip and obtains infrared spectrum.Can also using decay total reflection light spectrometer come
The infrared spectrum of sample is obtained, is not required to carry out sheeting operation to sample, directly wood powder to be measured or wood chip is scanned, made
Obtain operating process and more simplify convenient.
According to one embodiment of present invention, obtained by infrared spectrometer after infrared spectrogram, then to resulting
Infrared spectrogram carry out smooth and baseline correction processing.
According to one embodiment of present invention, in the step S3, some of the observation infrared spectrogram are specific
Waved band shape, judges whether the characteristic absorption peak consistent with standard items target seeds, according to the peak shape of characteristic absorption peak, peak
Position and intensity, judge whether the material of detection sample and standard items is consistent.Will to existing several characteristic peaks go out peak position,
Form and dimension identified in detail, if the peak shape at these specific absorption peaks, peak position and intensity are consistent with standard items,
Can have this and judge that detected sample is consistent with standard items material.
Using the method for the embodiment of the present invention, refine and summed up surely from the infrared spectrogram of a large amount of standard seeds samples
Fixed can be used for dalbergia odorifera, red sandalwood, toe yellow wingceltis, blood wingceltis, Dalbergia louvelii, nick yellow wingceltis, the broad-leaved that seeds are identified
The ft-ir characteristic absorption peak of the seeds such as yellow wingceltis, Burma padauk, its infrared spectrogram is respectively as shown in Fig. 2 to Fig. 9.
It is as the specific embodiment of the present invention, dalbergia odorifera and its common personation seeds broad-leaved yellow wingceltis, big fruit is purple
Wingceltis is distinguished that Figure 10 is to be contrasted according to the infrared spectrum of the dalbergia odorifera of the embodiment of the present invention, Burma padauk and broad-leaved yellow wingceltis
Schematic diagram.
With reference to Figure 10, the characteristic peak of dalbergia odorifera is primarily present in 2000-600cm-1In the range of.In dalbergia odorifera extract
Containing more oil substances, in 1741cm-1The absorption peak strength at place is higher than broad-leaved yellow wingceltis and Burma padauk.In addition, dalbergia wood
In yellow wingceltis there is larger difference in Flavonoid substances with two other seeds, 1509,1463,1423cm-1Absworption peak at wave number
Relative intensity it is different.Dalbergia odorifera is in 665cm-1In the presence of a weaker acromion, this is the pass for being different from other personation seeds
Key information.And this acromion can be influenceed by factors such as the age of tree, sampling points.Can also be according to the feature of other in above range
Difference is distinguished.
As the specific embodiment of the present invention, by red sandalwood and its common personation seeds Dalbergia louvelii, blood wingceltis
Distinguished, Figure 11 is to be contrasted to illustrate according to the infrared spectrum of the red sandalwood of the embodiment of the present invention, Dalbergia louvelii and blood wingceltis
Figure.
With reference to Figure 11, the characteristic peak of red sandalwood is primarily present in 1800-650cm-1In the range of.Red sandalwood is black with Lushi
The difference of yellow wingceltis is more apparent, because the content of Dalbergia louvelii extract is higher, 1509,1456cm-1The absorption peak strength at place
Higher than red sandalwood.Red sandalwood and the infrared spectrum of blood wingceltis are very much like, but the two there is also some stable differences.Wingceltis
Fragrant red sandalwood is in 1735cm-1The absorption peak strength at place is higher than blood wingceltis, and blood wingceltis is in 837cm-1The absorption peak strength at place is higher.May be used also
Distinguished according to other feature differences in above range.
As the specific embodiment of the present invention, toe yellow wingceltis is distinguished with its common personation seeds nick yellow wingceltis
Not, Figure 12 is the infrared spectrum contrast schematic diagram of the toe yellow wingceltis according to the embodiment of the present invention and nick yellow wingceltis.
With reference to Figure 12, the characteristic peak of toe yellow wingceltis is primarily present in 1800-650cm-1In the range of.Toe yellow wingceltis exists
1736cm-1The intensity of absworption peak is different from nick yellow wingceltis, in addition, nick yellow wingceltis is 1622,1595,1572cm-1At three wave numbers
The shape of absworption peak differs greatly with toe yellow wingceltis.Moreover, toe yellow wingceltis is 1031,836cm-1The intensity of absworption peak is weaker than nick
Yellow wingceltis.It can also be distinguished according to the feature difference of other in above range.
Verification experimental verification is repeated through substantial amounts of, the wherein checking of toe yellow wingceltis is more than 100 times, red sandalwood 50 times, and dalbergia wood is yellow
Wingceltis 20 times, as a result proves that the infrared signature absorption peak of these three rare seeds is stable, can be used as appraisal basis.Using this technology
Scheme can distinguish dalbergia odorifera and its personation seeds, and such as Annan yellow wingceltis, rattan perfume, plug state yellow wingceltis, Belize yellow wingceltis, big fruit are purple
Wingceltis, hedgehog red sandalwood, Ovshinsky yellow wingceltis, broad-leaved yellow wingceltis.Can also distinguish red sandalwood and blood wingceltis, Dalbergia louvelii, toe yellow wingceltis and its
Similar seeds nick yellow wingceltis, Barry yellow wingceltis, Ovshinsky yellow wingceltis and hophornbeam beans.
The method for the identification rosewood that the embodiment of the present invention is proposed, is identified using the middle infrared of infrared spectrum,
With advantages below：Sample size needed for identification is only 5mg or so, and testing sample is not damaged, and is a kind of Nondestructive Identification
Technology；Infrared spectrometer analyze speed is fast, the most used time 15min of process of whole sampling, sample preparation, test, analysis and identification；Behaviour
Make convenient, expense reduction；As a result it is accurate, objective, it is adapted to marketing.
Not enough there is provided lossless, quick, the easy behaviour of one kind for existing redwood identification technology many for the embodiment of the present invention
Work, objective and accurate redwood new Identification technology, show available for the fraud for solving the wooden trading of the big tribute in redwood market especially three
As so as to safeguard consumer's interests, non-causative fault is hit, and make tribute for protection rare and endangered tree species in specification lumber market
Offer.
Finally it should be noted that：The above embodiments are merely illustrative of the technical solutions of the present invention, rather than its limitations；Although
The present invention is described in detail with reference to the foregoing embodiments, it will be understood by those within the art that：It still may be used
To be modified to the technical scheme described in foregoing embodiments, or equivalent substitution is carried out to which part technical characteristic；
And these modification or replace, do not make appropriate technical solution essence depart from various embodiments of the present invention technical scheme spirit and
Scope.
Claims (10)
1. a kind of method for identifying rosewood, this method includes：
S1：Prepare sample strip and background plate；
S2：Scanning background piece and sample strip are distinguished using infrared spectrum, the infrared spectrogram of sample is obtained；
S3：According to the characteristic absorption peak information of the infrared spectrogram, whether the material of judgement sample and standard items is consistent.
2. according to the method described in claim 1, it is characterised in that in the step S1, preparing sample strip includes：
S11：Take redwood sample；
S12：After redwood sample is mixed with KBr, uniform grinding；
S13：Powder after grinding is put to tablet press machine and carries out tabletting.
3. method according to claim 2, it is characterised in that in the step S11, sampling sample is from redwood sample to be measured
Product concealment part scrapes micro wood powder, or is wood powder extract, and the solvent needed for extracting includes benzene alcohol, methanol, ethanol, third
At least one of ketone, water, petroleum ether, chloroform, ethyl acetate or n-butanol solvent.
4. method according to claim 2, it is characterised in that in the step S12, sample and KBr powder after grinding
The particle diameter at end is less than 2.5 μm.
5. method according to claim 2, it is characterised in that in the step S12 and S13, sample and KBr is mixed
The operating process of conjunction, grinding and tabletting is carried out in the range of exposures of infrared lamp.
6. according to the method described in claim 1, it is characterised in that the step S2 includes, joined using identical spectral scan
Number, scanning background piece and sample strip, obtain the spectrogram of sample strip successively.
7. method according to claim 6, it is characterised in that in the step S2, the scanning range of infrared spectrum is set
For 4000-400cm-1, spectral resolution is 4cm-1, cumulative scan 16 times.
8. according to the method described in claim 1, it is characterised in that in the step S2, sample strip is placed on infrared spectrometer
Tested on specimen holder in sample room, the infrared spectrogram of test sample product to obtain；Infrared spectrogram obtained by observation,
By adjusting the consumption of sample, make the transmitance of most strong absworption peak in sample spectra 10% or so, and most strong absworption peak and base
The difference of the transmitance of line is more than 60%.
9. method according to claim 8, it is characterised in that in the step S2, enter to resulting infrared spectrogram
Row is smooth and baseline correction is handled.
10. according to the method described in claim 1, it is characterised in that in the step S3, observe the ripple of the infrared spectrogram
Section shape, judges whether the characteristic absorption peak consistent with standard items, according to the peak shape, peak position and intensity of characteristic absorption peak,
Judge whether the material of detection sample and standard items is consistent.
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| CN108802037A (en) * | 2018-08-28 | 2018-11-13 | 西藏民族大学 | A kind of leaflet red sandalwood quality standard and its detection method |
| CN108956528A (en) * | 2018-08-01 | 2018-12-07 | 浙江农林大学 | The near-infrared Undamaged determination method of mahogany furniture |
| CN109781647A (en) * | 2018-12-13 | 2019-05-21 | 康美药业股份有限公司 | A kind of differentiating method of caulis piperis futokadsurae He Hance Pepper Stem and Leaf |
| CN111948329A (en) * | 2020-06-01 | 2020-11-17 | 上海市质量监督检验技术研究院 | Method for identifying pteroceltis tatarinowii and pteroceltis tenuipes |
| CN112649393A (en) * | 2021-01-14 | 2021-04-13 | 中国林业科学研究院木材工业研究所 | Infrared spectrum-based method for identifying small ornament of dalbergia odorifera |
| CN112649394A (en) * | 2021-01-14 | 2021-04-13 | 中国林业科学研究院木材工业研究所 | Dalbergia odorifera bracelet identification method based on infrared spectrum |
| CN112697744A (en) * | 2021-01-14 | 2021-04-23 | 中国林业科学研究院木材工业研究所 | Infrared spectrum-based identification method for Dongfei yellow sandalwood artware |
| CN112697743A (en) * | 2021-01-14 | 2021-04-23 | 中国林业科学研究院木材工业研究所 | Method for identifying pterocarpus santalinus pen container based on two-dimensional correlation infrared spectrum |
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| CN109781647A (en) * | 2018-12-13 | 2019-05-21 | 康美药业股份有限公司 | A kind of differentiating method of caulis piperis futokadsurae He Hance Pepper Stem and Leaf |
| CN111948329A (en) * | 2020-06-01 | 2020-11-17 | 上海市质量监督检验技术研究院 | Method for identifying pteroceltis tatarinowii and pteroceltis tenuipes |
| CN112649393A (en) * | 2021-01-14 | 2021-04-13 | 中国林业科学研究院木材工业研究所 | Infrared spectrum-based method for identifying small ornament of dalbergia odorifera |
| CN112649394A (en) * | 2021-01-14 | 2021-04-13 | 中国林业科学研究院木材工业研究所 | Dalbergia odorifera bracelet identification method based on infrared spectrum |
| CN112697744A (en) * | 2021-01-14 | 2021-04-23 | 中国林业科学研究院木材工业研究所 | Infrared spectrum-based identification method for Dongfei yellow sandalwood artware |
| CN112697743A (en) * | 2021-01-14 | 2021-04-23 | 中国林业科学研究院木材工业研究所 | Method for identifying pterocarpus santalinus pen container based on two-dimensional correlation infrared spectrum |
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Inventor after: Huang Anmin Inventor after: Zhang Fangda Inventor after: Xu Shu Inventor after: Sun Suqin Inventor after: Xu Changhua Inventor after: Wang Liyu Inventor before: Zhang Fangda Inventor before: Huang Anmin Inventor before: Xu Shu Inventor before: Sun Suqin Inventor before: Xu Changhua Inventor before: Wang Liyu |
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Application publication date: 20170825 |